EP 0387453 A1 19900919 - Steerable guidewire having electrodes for measuring vessel cross-section and blood flow.
Title (en)
Steerable guidewire having electrodes for measuring vessel cross-section and blood flow.
Title (de)
Steuerbarer Führungskörper mit Elektroden zur Messung der Blutströmung und des Querschnitts von Blutgefässen.
Title (fr)
Corps de guidage pourvu d'électrodes destinées à la mesure de la section de vaisseaux et à l'évaluation du débit sanguin.
Publication
Application
Priority
US 32522389 A 19890317
Abstract (en)
A small diameter steerable guidewire (10) that is used to guide a catheter in transluminal coronary angioplasty is provided with a pair of electrodes (20, 22) for measuring the cross-sectional area of a blood vessel and for measuring blood flow. The guidewire includes a shaft (12) and a tip (14) attached to the distal end (12a) of the shaft. The shaft is torsionally rigid along its length and includes a conductive tube (28) and a wire (26) extending through the tube. The tip, which can be bent to a prescribed curve when relaxed, is sufficiently flexible to adapt to and follow the contours of a blood vessel. The tip includes a tapered extension (26a) of the wire in the shaft. A proximal electrode (22) and a distal electrode (20) are coaxially mounted on the tapered wire and are electrically connected to the tube (28) and the wire (26), respectively. The electrodes are axially spaced apart by a predetermined distance. Each electrode is preferably a conductive, helically-wound spring. The outside diameter of the steerable guidewire preferably does not exceed about 0,5 mm for coronary use.
IPC 1-7
IPC 8 full level
A61B 5/026 (2006.01); A61B 5/027 (2006.01); A61B 5/042 (2006.01)
CPC (source: EP US)
A61B 5/027 (2013.01 - EP US); A61B 5/0295 (2013.01 - EP US); A61B 5/287 (2021.01 - EP US); A61B 5/6851 (2013.01 - EP US); A61B 5/6853 (2013.01 - EP US); A61B 5/6855 (2013.01 - EP US)
Citation (search report)
- [X] US 3773037 A 19731120 - KOLIN A
- [X] EP 0249338 A2 19871216 - BARD INC C R [US]
- [XD] US 4481953 A 19841113 - GOLD PHILIP [US], et al
- [A] US 3060923 A 19621030 - STUART REINER
Designated contracting state (EPC)
DE ES FR GB IT NL
DOCDB simple family (publication)
EP 0387453 A1 19900919; AU 4682189 A 19900920; CA 2010436 A1 19900917; JP H02279132 A 19901115; US 4957110 A 19900918
DOCDB simple family (application)
EP 89313378 A 19891220; AU 4682189 A 19891214; CA 2010436 A 19900220; JP 6676590 A 19900316; US 32522389 A 19890317